/*

File: BonjourBrowser.m
Abstract: 
 A subclass of UINavigationController that handles the UI needed for a user to
browse for Bonjour services.
 It contains list view controllers for domains and service instances.
 It allows the user to add their own domains.
 

Version: 2.5

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*/

#import "BonjourBrowser.h"
#import "BrowserViewController.h"
#import "DomainViewController.h"


@interface BonjourBrowser ()
@property(nonatomic, retain, readwrite) BrowserViewController* bvc;
@property(nonatomic, retain, readwrite) DomainViewController* dvc;
@property(nonatomic, retain, readwrite) NSString* type;
@property(nonatomic, retain, readwrite) NSString* domain;
@property(nonatomic, assign, readwrite) BOOL showDisclosureIndicators;
@property(nonatomic, assign, readwrite) BOOL showCancelButton;
- (void) setupBrowser;
@end


@implementation BonjourBrowser


@synthesize bvc = _bvc;
@synthesize dvc = _dvc;
@synthesize type = _type;
@synthesize domain = _domain;
@synthesize showDisclosureIndicators = _showDisclosureIndicators;
@synthesize showCancelButton = _showCancelButton;


- (id) initForType:(NSString*)type inDomain:(NSString*)domain
	   customDomains:(NSMutableArray*)customDomains
	   showDisclosureIndicators:(BOOL)showDisclosureIndicators
	   showCancelButton:(BOOL)showCancelButton {
	
    // Create some strings that will be used in the DomainViewController.
	NSString *domainsTitle = NSLocalizedString(@"Domains", @"Domains title");
	NSString *domainLabel = NSLocalizedString(@"Added Domains", @"Added Domains label");
	NSString *addDomainTitle = NSLocalizedString(@"Add Domain", @"Add Domain title");
	NSString *searchingForServicesString = NSLocalizedString(@"Searching for services", @"Searching for services string");
    
    // Initialize the DomainViewController, which uses a NSNetServiceBrowser to look for Bonjour domains.
	DomainViewController* dvc = [[DomainViewController alloc] initWithTitle:domainsTitle showDisclosureIndicators:YES customsTitle:domainLabel customs:customDomains addDomainTitle:addDomainTitle showCancelButton:showCancelButton];
	
	if (dvc && (self = [super initWithRootViewController:dvc])) {
		self.type = type;
		self.showDisclosureIndicators = showDisclosureIndicators;
		self.showCancelButton = showCancelButton;
		self.searchingForServicesString	= searchingForServicesString;
		self.dvc = dvc;
		[self.dvc setDelegate:self];
		[self.dvc searchForBrowsableDomains]; // Tells the DomainViewController's NSNetServiceBrowser to start a search for domains that are browsable via Bonjour and the computer's network configuration.

		if ([domain length]) {
			self.domain = domain;
			[self setupBrowser]; // Initiate a search for Bonjour services of the type self.type.
			[self pushViewController:self.bvc animated:NO];
		}
	}
	
	[dvc release];
	
	return self;
}

- (NSString*) searchingForServicesString {
	return _searchingForServicesString;
}

// This property holds a string that displays the status of the service search to the user.
- (void) setSearchingForServicesString:(NSString*)searchingForServicesString {
	if (_searchingForServicesString != searchingForServicesString) {
		[_searchingForServicesString release];
		_searchingForServicesString = [searchingForServicesString copy];

		if (self.bvc) {
			self.bvc.searchingForServicesString = _searchingForServicesString;
		}
	}
}

- (void) setDelegate:(id<BonjourBrowserDelegate>)delegate {
	__delegate = delegate;
	super.delegate = delegate;
}


- (id<BonjourBrowserDelegate>) delegate {
	assert(__delegate == super.delegate);
	return __delegate;
}


- (BOOL) showTitleInNavigationBar {
	return _showTitleInNavigationBar;
}


- (void) setShowTitleInNavigationBar:(BOOL)show {
	_showTitleInNavigationBar = show;
	if (show) {
		self.bvc.navigationItem.prompt = self.title;
		self.dvc.navigationItem.prompt = self.title;
	} else {
		self.bvc.navigationItem.prompt = nil;
		self.dvc.navigationItem.prompt = nil;
	}
}


- (void) browserViewController:(BrowserViewController*)bvc didResolveInstance:(NSNetService*)service {
	assert(bvc == self.bvc);
	[self.delegate bonjourBrowser:self didResolveInstance:service];
}

// Create a BrowserViewController, which manages a NSNetServiceBrowser configured to look for Bonjour services.
- (void) setupBrowser {
	BrowserViewController* aBvc = [[BrowserViewController alloc] initWithTitle:self.domain showDisclosureIndicators:self.showDisclosureIndicators showCancelButton:self.showCancelButton];
    aBvc.searchingForServicesString = self.searchingForServicesString;
	aBvc.delegate = self;
    // Calls -[NSNetServiceBrowser searchForServicesOfType:inDomain:].
	[aBvc searchForServicesOfType:self.type inDomain:self.domain];

    // Store the BrowerViewController in an instance variable.
	self.bvc = aBvc;
	[aBvc release];
	if (self.showTitleInNavigationBar)
		self.bvc.navigationItem.prompt = self.title;
}

// This method will be invoked when the user selects one of the domains from the list.
// The domain parameter will be the selected domain or nil if the user taps the 'Cancel' button (if shown).
- (void) domainViewController:(DomainViewController*)dvc didSelectDomain:(NSString*)domain {
	if (!domain) {
		// Cancel
		[self.delegate bonjourBrowser:self didResolveInstance:nil];
		return;
	}

	self.domain = domain;
	[self setupBrowser];
	[self pushViewController:self.bvc animated:YES];
}


- (void) dealloc {
	[_dvc release];
	[_bvc release];
	[_type release];
	[_domain release];
	[_searchingForServicesString release];
	[super dealloc];
}

@end
